Citat:
Nej, det stämmer inte.
Citat:
Den genomsnittliga aktiva investeraren kommer alltid att underprestera den genomsnittliga passiva investeraren efter avgifter, eftersom alla aktiva investerare tillsammans håller marknaden men har högre avgifter eftersom dom köper och säljer oftare (och aktiva fonder har högre förvaltningsavgifter). Tekniskt sett borde man säga "den genomsnittliga aktivt/passivt investerade kronan", men i praktiken är det ingen skillnad. William F. Sharpe skriver om detta i artikeln "The Arithmetic of Active Management".
Citat:
https://web.stanford.edu/~wfsharpe/art/active/active.htm
If "active" and "passive" management styles are defined in sensible ways, it must be the case that
(1) before costs, the return on the average actively managed dollar will equal the return on the average passively managed dollar and
(2) after costs, the return on the average actively managed dollar will be less than the return on the average passively managed dollar
These assertions will hold for any time period. Moreover, they depend only on the laws of addition, subtraction, multiplication and division. Nothing else is required.
(1) before costs, the return on the average actively managed dollar will equal the return on the average passively managed dollar and
(2) after costs, the return on the average actively managed dollar will be less than the return on the average passively managed dollar
These assertions will hold for any time period. Moreover, they depend only on the laws of addition, subtraction, multiplication and division. Nothing else is required.